Automatic stop motion for spinning frames



May 6, 1930. D. WIDAVIS AUTOMATIC S'IbP MOTION FOR SPINNING FRAMES Filed Oct. 28. 1927 Fll-IAIIIIL Inventor ,D. Wfiazfis Attorney Patented May 6, 1930 UNETED STATES PATENT OFFICE DEED W. DAVIS, 0F SILURIA, ALABAMA, ASSIGNOR OF ONE-HALF TO K. B. NIGKERSON, 0F SIL'U'RIA, ALABAMA AUTOMATIC STOP MOTION FOR SPINNING FRAJVIES Application filed October 28, 1927. Serial No. 229,497.

My invention relates to an automatic stop motion for spinning frames and the like, and has for its object to provide means, simple in their structure, easily installed, and automatic in their functioning, to insure the stoppage of the frame when its drive slows abnormally or stops for any reason, or when its yarn carriers have been filled.

Automatic stop motions controlled entire ly by the position of the ring rail or parts connected therewith are well known in this art and they have served the purpose for which they were designed, namely, to insure the aw tomatic stoppage of the spinning frame when the ring rail had reached its highest position and the quills or yarn carriers thereon had been filled. Such mechanisms met the requirements of the mills under conditions under which they were designed, but now that i the use of an electric motor drive for cotton mills is becoming more universal a new condition confronts the mill operator. The power service is veryfrequently interrupted or falls below mill requirements under peak load conditions and in the event of such occurrences the spinning machinery will slow up or stop and willbe left connected to its drive unless the operators are alert and have time to shift the stop motions on the various machines under their control. It is highly disadvantageous, as is well known to those skilled in the art, to leave the spinning frames connected to the drive after the latter has been interrupted and the chief object of my invention is to insure an automatic disconnection of the spinning frame from its drive when the latter has stopped or slowed up abnormally.

My invention contemplates the c-ombinat-ion with spring-pressed means to throw the stop motion, of a latch which restrains the spring means from acting until the latch is tripped either by the ring rail or parts movable therewith after the yarn carriers have been filled, or, in the event the spinning frame drive has been interrupted, by the action of a speed governor. It is contemplated that these automatic agencies will not lnterfere with each other or with the normal manual operation of the stop motion.

details of construction and arrangements of parts, which in their preferred embodiment only are illustrated in the accompanying drawings which form a part of this specification, and in which r Fig. l is a cross-sectional view through a conventional type of spinning frame showing the shifter rod controlling the stop motion in cross-section and the automatic agencies in elevation. i

Fig: 2 is a detail view illustrating the latch controlled spring operated shifter mechanism for the stop motion.

Similar reference numerals refer to simi lar parts throughout the drawings. y

In the embodiment of my invention illustrated, I show aspinning machine which is typical of any like winding frame having transverse frame members 3 and a longitudinal drive cylinder at for the belts 5 lead ing to pulleys 6 which drive the spindles 7. The bobbins or yarn carriers, not shown, are mounted upon the spindles 7 and the yarn is guided thereto by ring rails 8 which rise and fall under control of the traverse motion (not shown) of the spinning frame. As is well known to those skilled in the art, the ring rail is lowered to the base of the spindles at the commencement of the winding of the yarn carriers and as the winding proceeds the ring rail gradually raises until at the completion of the winding operation, when the carriers have been filled, the ring rail will reach its highest position. Thereupon it is customary to doif the frame which involves lowering the ring rail to its lowermost position preparatory to replacing the yarn carriers for a new winding operation.

All of the mechanism and the parts above described form no particular part of my invention and are capable of wide modification in the art to which my invention pertains. My invention, in its preferred embodiment. comprises a bracket 9 having an upturned U-socket adapted to receive the flange of the frame anglelO and to be clamped thereto by set screws 11. On the bracket overhanging towards the center of the frame I mount a bell crank lever having one end 12 adapted to engage the shifter rod 13 for controlling the stop motion of the frame and, having its other end 14 angled and disposed to overhang the ring rail in position to be engaged by the latter when it reaches its extreme uppermost position, i. e., at the completion of the filling. of the yarn carriers. In order to provide a simple adjustment for the operating engagement between the ring rail and this latch I provide the latch with an adjustable screw stop 15 which can be set to engage the ring rail at the desired point for tripping the latch. The latch end 14 will overbalance its end 12 and cause the latter normally to engage the shifter rod 13. I mount fixedly on the shifter rod 13 a collar 16, which the latch 12 normally engages, and I mount loosely on the shifter rod a sleeve 17 of substantially larger diameter than the collar 16 and adapted to be drawn against the collar by the coiler spring 18 which is connected at one end to an eye 19 on the sleeve and at the other end to a frame member 3. This collar 17 will be normally engagedby the latch 12 when in its operating position and will restrain the spring from moving the sleeve and shifting the rod to the right (Fig. 2), which is its direction of motion tostop the spinning frame.

The apparatus thus far described will act automatically, responsive to the filling of the yarn carriers, to trip the latch and permit the stop motion to be thrown out and to 'disconnect the machine I from its drive. The shifting travel of the rod 13 is less than the length of the sleeve 17 so that the latch 12 will engage under the collar until the shifter rod is moved back to position to start up the spinning framewhen it will drop in front of the collar 17 as shown in Fig. 2.

In order that the apparatus may respond automatically to a slowing up or stoppage of the frame drive before the completion of the filling operation, I provide the bracket 9 with a downward extension 20 and in a lateral offset thereof is an elongated vertical bearing 21 in which the governor shaft 22 rotates. This shaft carries at its lower end a grooved pulley 23 driven by a belt 24 from the drum 4. A governor mechanism 25 of any convention'al type is driven by the shaft 22 and acts through a U-shaped yoke 26, which straddles bearing 21, to engage abell crank 27 pivoted to the bracket 9 and adapted to engage the latch arm 14 and move it in a direction to trip the latch when the governor assumes an abnormally slow speed or stops. It thus follows that whenever the frame drive is interrupted or slows down abnormally the stop motion'ofthe frame will be automatically actuated by the speed governortripping the latch 12, thereby permitting the springpressed sleeve 17 to engage collar 16 and shift the rod 13 so as to operate the stop motion and disconnect the frame from its drive until the stop motion is again set by hand.

The latch 12 will hold the spring-pressed collar in position, permitting the shifter rod 13 to be operated by hand in the usual manner and the latch is so narrow that it will not interfere with the operation of the device even if it shifts into position between the collar 16 and sleeve 17, but usually the latch 12 will remain in position due to the pressure of the sleeve 17 against it and the collar 16 will move back into position under it, as shown in Fig. 2, when the frame is started up again by hand.

Though I have described with great particularity the details ofthe embodiment of the invention herein shown, it is not to be construed that I am limited thereto, as changes in arrangement and substitution of equivalents may be made by those skilled in the art without departing from the invention as defined in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. An automatic stop mechanism for spinning, winding and twisting frames, comprising a shift element for operating the stop mechanism, spring means tending to move said shift element to stop the frame, latch means to restrain said means from moving said shift element, and two independent mechanisms respectively, responsive to the filling of the yarn carriers and to any stoppage of the drive for the frame, which are adapted to trip said latch.-

2. An automatic stop mechanism for spin ning, winding and twisting frames, comprising movable yarn guides, an element for operating the stop motion for the frame, a fast collar and a loose spring-pressed sleeve on said element, the sleeve when released being adapted to engage the collar and shift said element to stop the frame, a latch adapted to restrain said sleeve from shifting said element, means movable with said yarn guides to trip said element automatically at the completion of the winding operation, and a speed governor responsive to the drive for the frame and also adapted to trip said latch when the speed of the frame drive falls below a predetermined point.

3. An automatic stop mechanism for spinning, winding and twisting frames, comprising a shift rod for operating the frames stop motion having a collar fast thereon, an element loose on the rod and spring-pressed in a direction when released to engage said collar and actuate said rod to disconnect the frame from its drive, a latch to restrain said loose element and prevent its actuating the shift rod until the latch is tripped, and a speed responsive means co-ordinated with the drive of the frame and adapted to trip the latch when the drive is interrupted.

4. An automatic stop mechanism for spinning, winding and twisting frames, the combination with yarn guides, of a bracket adapted to be mounted fast on the frame, a latch pivotally mounted on the bracket and adapted to be tripped by the yarn guides when the yarn carriers have been filled, a speed governor mounted on said frame, means to drive said governor from the drive of the frame, a device actuated by the governor under abnormally low speeds to trip said latch, and automatic mechanism controlled by said latch and adapted when released to stop the frame.

5. In an automatic stop motion for spinning frames having a ring rail for guiding yarn to yarn carriers, a shifter rod controlling the stop motion of the frame, automatic means for shifting said rod and stopping the frame, a latch to restrain said automatic means from functioning, said latch being mounted on the frame and disposed to be en gaged by the ring rail at the top of its travel, and speed responsive means coordinated with the frame drive and also adapted to trip said latch when the frame drive is interrupted, said latch and its control mechanisms leaving the shifter rod free for normal manual op eration.

In testimony whereof I aflix my signature.

DRED W. DAVIS. 

